div {
    box-sizing: border-box;
}

button {
    outline: none;
    border: none;
}

.snake-wrap {
    width: 600px;
    height: 720px;
    margin: 50px auto;
    background-color: limegreen;
    /* border: 1px solid #000; */
}

.info-bd {
    height: 60px;
}

.info-bd .info-item {
    float: left;
    width: 50%;
    height: 100%;
    text-align: center;
    line-height: 60px;
    font-size: 20px;
    color: #fff;
    
}

.game-bd {
    height: 600px;
    background-color: #000;
}

.btn-group {
    height: 60px;
}

.btn-group .btn{
    float: left;
    width: 33.33%;
    height: 100%;
}

.btn-group .btn button {
    width: 100%;
    height: 100%;
    background-color: transparent;
    color: #fff;
    font-size: 20px;
    cursor: pointer;
}

.btn-group .btn button:hover {
    background-color: lime;
}

.btn-group .btn button:disabled {
    background-color: lightgreen;
}